Influence of natural fibers on the mechanical properties and biodegradation of poly(lactic acid) and poly(ε‐caprolactone) composites: A review

This article highlights developments in viable poly(lactic acid) (PLA) and poly(ε‐caprolactone) (PCL) ecofriendly products with enhanced mechanical properties and biodegradation based on natural resources for both reinforcements and matrices. In recent times, several techniques have emerged with emphasis on enhancing mechanical, biological, and chemical properties equivalent to or superior to conventional polymers in use. Chemical and physical modifications of the fibers and in some cases polymer matrix or both are used to obtain properties suitable for the intended application. The mechanical properties and biodegradation of PLA and PCL natural fiber composites were enhanced by the treated fibers. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers     

Polymer Hydrogels: A Review

This review encompasses definitions, classification, main properties, and application of polymer hydrogels. Raw materials and preparation techniques of polymer hydrogels were described. The factors that affect absorption capacity and swelling properties of polymer hydrogels were reviewed. PHG materials are defined as a viscoelastic network structure, swellable and not soluble in water with high absorbent capacity, which may reach 1000 g/g of their dried weight to be termed “superabsorbent polymer hydrogels”. PHGs have the ability to release absorbed fluids under certain circumstances.